<html>
    <body><sTRONG>6543</sTRONG>
        <center><table border="1"><tr><td>a</td></tr></table></center>
        <pre>123
            456
            789
        </pre>
        <table>
            <tr>
                <td>
                    <input type="text" size="20" onmouseover="alert('mouse is over.');"><br>
                    <input type="text" size="20" onmousedown="alert('mouse is down.');"><br>
                    <input type="text" size="20" onmouseup="alert('mouse is up.');"><br>
                </td>
                <td>
                    <input type="radio" name="rdo" checked onmouseout="confirm('mouse is out');">星期六<br>
                    <input type="radio" name="rdo" onmouseout="confirm('mouse is out');">星期日
                </td>
                <td>
                    <input type="checkbox" onclick="alert('mouse is clicked.')">五一<br>
                    <input type="checkbox" onclick="alert('mouse is clicked.')">十一<br>
                    <input type="checkbox" onclick="alert('mouse is clicked.')">春节
                </td>
            </tr>
        </table>
        <table><tr><td><ol start="3" type="A">
            <li>张三</li>
            <li>李四</li>
            <li>王五</li>
            <li>陈六</li>
        </ol></td>
        <td><ul type="square">
            <li>三国演义</li>
            <li >红楼梦</li>
            <li>水浒传</li>
            <li>西游记</li>
        </ul></td></tr></table>
    <address>崔兴好 江苏南京</address>
    </body>
    <head>
        <s>1234</s>
        <title>4567</title> <BIG>7890</BIG>
    </head>
</html>